at that weight, 150mg of furazan might be fine, but you will still need 2 bottles, so you can play it by ear so to speak on your cycle, and see what 3 caps does for you for a couple weeks and if you feel good about it, you'll have some extra caps to go up to 200mg on week 4 and 5, or you can just stay at 150mgs.
same thing with the Havoc ... see how you feel at 30mgs for a week and then if you feel good, you can run it up to 40mgs for the last week or 2.
They are both pretty mild PH's, but you never know how your body will react.
I have had no sides yet, but the higher dosage weeks are still ahead, so am about to find out.